Method of forming filter housings



June 16, 1953 J. J. DREZNES 2,641,826

. 7 METHOD OF FORMING FILTER HOUSINGS Filed Jan. 29, 1949 3 Sheets-Sheet l lkvenzar $70k)? .Z'Jrezwas June 16, 1953 J. J. DREZNES 2,641,826

METHOD OF FORMING FILTER HOUSINGS Filed Jan. 29, 1949 3 Sheets-Sheet 2 Jkvenzar J/W? Jfflreznes M vw flffarnqy:

June 16, 1953 Filed Jan. 29, 1949 J. J. DREZNES METHOD OF FORMING FILTER HOUSINGS 3 Sheets-Sheet 3 Patented June 16,1953 f i 2,641,826 METHOD OF FORMING FILTER HOUSINGS' John J. memes Chicago, assig mr toUnited ,i 'ecialties company, Chicago, 111., a co poratio'li of Delaware Application may 29, 1949, Serial No. 73,594

3 Claims. (0119 1483) This invention relates to an air cleaner or dust directed to. the method of making a housing which encloses the filter unit in such an air cleaner. 7 a is in the finished position, as shown in Figure 1 'Another object is'to provide a'filter body inparticularly, an opening or space H is formed tended to' be positioned in a cleaner assemblyv within the leg and the leg thus presents a miniand to provide, as a part of the body,- spacing mum of resistance to flow past or through it. means to insure proper spacing of the filter body The leg is preferably made f thin material within the total air cleaner assembly. 10 present a minimum of resistance to the flow of Another object is to provide a method of fiuid. After the leg portion has beensevered,as forming such spacing means. v i 'shownin Figure 3, it is shaped to bringuthe two Another object is to provide a metho d of formparts 9, 9 into parallelism, as shown in Figure ing such spacing means integrally with the body 2. Then it is bent about the exterior of the housing andof forming such spacing meansas curved portion '3 ofIthehousing. The portions 2. part of the processor method of forming the 9 arebent fiush against the outer surface of the filter body housing. curved portion 3 and the connecting portion 10 Other objects will appear from time to time is shaped to lie transversely between the memin the course of the specification. bers 9 and to'form an outwardly projecting open This invention is illustrated more or less. dia-' foot or leg portion. After this shaping operation grammatically in the accompanying drawings has been carried out, a section of wire screen or wherein: v V i v I other perforate material is laid in position, as Figure 1 is a section through one form of the shown particularly in Figure 1, and this screen housing or container for the filter body; section I -2 spans the openings 8 and overlies the Figure 2 is a bottom plan view of thehousing feet portions 9 and I0. After the screen section member shown in Figure 1; i Y I I is in place it is welded to the housing, and at the Figure 3 is a plan view showing the blank from same welding operation the portions 9 are welded which the housing is formedbefore the housing to the outer surface of the housing. Thus at a has been given-its final shape; and 1 single welding operation the screen is welded in Figure 4 is a side elevation with parts in sec-'- place and the feet portions 9' are welded in place. tion illustrating a complete cleaner with the de- 7 The welding steps are not essential. Since the viceof the present invention in place therein. legs formed by the parts 9 and Ill are integral Like parts are indicated by like numbers with the shell 2, they may merely be'shaped throughout the specification and drawings. properly without being welded or otherwise addi- The housing or container for the filter mass tionally secured in place, and the screen may which together with the filter mass comprises the merely be laid into place, if desired. Thus the filter body is shown in its completed form in foot construction is formed integrally with the Figures 1 and 2 and assembled with the total housing. It is formed of material which would cleaner in Figure 4; This housingcomprises a otherwise be wasted, and it is formed simulmember having an annular wall I and a'n out- 40 taneously with the formation of the housing. wardly bent or curved upper flange 2. The wall Similarly, only a single welding is required to I is integral at its lower end with a curved porsecure the screen section in place and to secure tion 3 which is connected by arms 4 to a central the feet members in place. I ring-like portion 5 which terminates in an up- With the filter body housing formed, as shown wardly projecting annular portion iii. The memin Figure 1, it is then filled with a mass of filter her 5 is upturned at its outer edges to provide a material l3, and, if desired, a member I4 which trough like portion 1 and the arms 4, 'a'sshown may be formed of wire mesh or other perforate in Figure I particularly, are provided with upmaterial is placed on top ofthe filter mass I3. turned edges so that their lower surfaces are i The filter body is assembled with a cleaner. round. The arms 4' are formed by severing parts The cleaner comprises, as shown in Figure 4-, a of the blank from which thehousing is made. housing member l5'which is provided with a This severing operation produces openings or downwardly and inwardly turned lip I6 at its spaces 8 between the arms 4. V upper edge. The housing is closed at its bottom When the severing or shearing operation to by a cup portion which includes the relatively flat form the spaces 8 is carried out, three or more curved part" I! and the deeper and more sharply members are allowed to remain to form legs separator and in its present form is particularly which support and space the housing. Each of these legs comprises a pair of side portions 9 which are integral with the blank and which are joined by an integral central portion Ill. The portion Ill joins the members 9. When the leg curved portion l8 A tiibul-a-r portibfi I9 is integral with the portion l8 and is also integral with.

a shoulder 20 and an upwardly extending tubular portion 2|. A baffle 22 is positioned on the shoulder 20 anda gasket 23 seals the members. The filter body is positioned above the baffle 22 and the'center of the filter body is defined by an air passage member 24 which is outwardly flared at 25 and terminates in a downwardly bent lip portion 26. A tubular member 21 is secured to the tubular portion 2| and contains a spider 28 within which a retaining member 29 is fixed. This member is threaded at its upper end at 30 to receive a thumb nut 3 I. A cover plate 32 comprises the top of the cleaner and is fixed to the filter body housing portion by being downwardly bent, as at 33, about the outer edge or" the fiared portion 2 of the housing I.

Fixed to the cup member I5 is a second cup 34 which is also fixed at its inner edge, as at 35, to the tubular member 21. A resonator 36 is positioned about a substantial portion of the cleaner assembly and is fixed at its inner edge to a tubular member 31 which is shaped to provide a shoulder 38. A second tubular member 39 is also fixed to the resonator and a packing member Miis positioned against the shoulder 38 between the members 3'! and 39. A clamping ring Ill is positioned about the member 39 and is provided with a tightening and attaching screw 42 by means of which the cleaner is rem'ovably and adjustably fixed in place upon a carburetor intake or at any other place where a cleaner of this type is to be used.

The filter body shown and described herewith is not limited in its use to the particular association shown. It'might be used with many types of cleaners. It is intended for use with a cleaner which includes a cup portion and the feet provide accurate and positive spacing of the filter body within the cup portion. The filter body I and the cup portion I5 form an annular inlet passage and it is important that that passage be uniform and that the filter body be accurately and positively spaced within the cleaner. It is also important to interrupt the flow of air or fluid as little as possible. The legs present a minimum resistance and interruption to the flow of air past them. As shown particularly in Figure l, the legs are open and only the thin section of the legs is presented to the inflowing air and thus'a minimum of resistance and disturbance is caused by the legs.

While it is economical to form legs of the type shown as described above and as a part of the method of formation of the housing, obviously instead of forming these U-shaped legs integrally with the housing, they might be separately formed. Thus a U-shaped clip or leg, similar in shape and size to that shown in the drawings, might be formed separately and Welded or otherwise secured to the housing I in the position in which the legs 9, I are shown.

Whatever the exact contour of the legs and whatever the exact method of forming or attaching them may be, they are so arranged that they have sufficient structural strength to form a positive stopping and spacing means to insure the proper positioning of the filter body with relation to the cleaner housing. Also, the legs are so shaped that they present a minimum of resistance to the flow of air entering the cleaner. The air flowing through the air gap between the housings I and I passes parallel to the'width of the leg.

Although I have shown an operative form of my invention, it will be recognized that many changes in the form, shape and arrangement of parts can be made without departing from the spirit of the invention, and my showing is therefore to be taken as, in a sense, diagrammatic. Although the shell I and the spider portion 4 are shown as shaped integrally, it is to be understood that the spider might be formed of a separate piece positioned withor secured to the shell I, and the invention is not limited, therefore, to a structure in which the shell I and the portions 3, 4, 5, 6 and I are all integral with each other.

I claim:

1. The methodof forming a filter body which comprises the steps of shaping a piece of sheet material into a generally cup-like shape having a bottom, removing separated portions of said bottom and. providing thereby a plurality of openings, forming within said openings spacing members, each comprising a pair of leg-like members diverging from each other and an integral joining part connecting said leg-like members, bending each joining part out of plane of said leg-like members and thereby moving the leg-like members of each pair'toward each other and thereafter bending said leg-like members outwardly about and against said bottom.

The method of forming a filter body which comprises the steps of shaping a piece of sheet material into a generally cup-like shape having a bottom, shaping said bottom with a rounded edge portion, removing separated portions of said bottom and providing thereby a plurality of openings, forming within said openings spacing members, each comprising a pair ofleg-like members diverging from each other and an integral joining part connecting said leg-like members, bending each joining part out of plane of said leg-like members and thereby moving the leg-like members of each pair toward each other and thereafter bending said leg-like members into the curvature of said rounded edge portion and bending said rounded leg-lik portions outwardly about and against said bottom. I

3. The method of forming a filter body which comprises the steps of shaping a piece of sheet material into a generally cup-like shape having a bottom, removing separated portions of said bottom and providing thereby a plurality of openings, forming integrally with said body spacing members comprising pairs of diverging leg-like parts with an integral part joining each pair of leg-like parts, bending the joining part of each set of leg-like parts out of the plane of said parts, andmoving said parts toward each other, thereafter bending the spacing member as a whole about and against the bottom of the cup and welding said leg-like parts to said bottom.

JOHN J. DREZNES.

References Cited'in the file of this patent UNITED STATES PATENTS Number Name Date 1,215,553 Lachman Feb. 13, 1917 1,739,372 Pirichio 1 Dec. 10, 1929 1,777,369 Jacobs Oct. 7, 1930 1,964,770 Runge -1 July 3, 1934 2,031,936 Cuno Feb. 25, 1936 2,033,692 Dover Mar. 10, 1936 2,079,888 Wemp May 11, 1937 2,088,992 BierWith-et al. Aug. 3, 1937 2,174,639 Sinclair Oct. 3, 1939 2,180,411 Graham Nov. 21, 1939 2,260,899 Heftler Oct. 28, 1941 2,354,439 Brink July 25, 1944 2,406,188 Beatty et al. Aug. 20, 1946 2,459,423. Jacobi Jan. 18, 1949 

